JP2006139685A - Sheet metal working diagram automatic generating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet metal working diagram automatic generating system capable of automatically generating a sheet metal working diagram by a specified easy operation procedure. <P>SOLUTION: A working condition information storing means 1 stores a working condition information including at least a processing machine applicable condition information 2 and a die information 3. A working diagram generation basic condition inputting means 4 outputs a two-dimensional sheet metal profile information 5 and a bending attribute information 6 by the operation specified by a drawing preparer. A sheet metal working diagram generating means 7 comprises a profile/hole shape recognizing means 8, a hole shape classifying means 9, and a working process setting means 10. It, when inputted with information 5 and 6 from the input means 4, generates and outputs a sheet metal working diagram 11 based on the inputted information as well as the information 2 and 3 stored in the storing means 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sheet metal working drawing automatic creation system for creating a sheet metal working drawing including a two-dimensional sheet metal shape and machining condition information.

  When manufacturing an assembly from a sheet metal material in sheet metal processing, it is necessary to create a sheet metal development drawing for reference by field workers at the processing site, in addition to the assembly completion drawing created by the designer. This sheet metal development is a two-dimensional sheet metal shape developed as an CAD drawing on a plane by developing an assembly. As a data format representing the two-dimensional sheet metal shape, DXF (Autodesk Drawing eXchange Format) which is a de facto industry standard data file format is usually used.

  In sheet metal processing, it is also necessary to set processing conditions in advance for various types of processing (for example, cutting processing, drilling processing, grooving processing, welding processing, etc.) performed before obtaining an assembly from a sheet metal material.

An operator performs sheet metal processing consisting of various processes on site while referring to the above-described two-dimensional sheet metal shape information and processing condition information. As such a sheet metal working, there is a technique disclosed in Patent Document 1, for example, as a technique for performing accurate estimation using CAD data.
JP-A-9-62729

  As described above, in order for a field worker to obtain an assembly from a sheet metal material, the two-dimensional sheet metal shape information and processing condition information must be referred to. Here, the two-dimensional sheet metal shape information can be automatically acquired by performing a predetermined development process on the assembly using a CAD device.

  However, the processing condition information is miscellaneous in various contents over a plurality of processes, and further, if the assembly is in other varieties, the contents become even more miscellaneous, so this is automatically acquired. It was difficult. Therefore, conventionally, processing condition information obtained by human work and added to the two-dimensional sheet metal shape information is created as a sheet metal working drawing for a site worker to refer to.

  However, creating a sheet metal working drawing based on human-related work in this way naturally imposes a considerable amount of labor on the drawing creator. Moreover, since it is a human work, there are many cases where mistakes occur, and for this reason, defective products due to errors in the sheet metal work drawing may occur.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a sheet metal working drawing automatic creation system capable of automatically creating a sheet metal working drawing by a predetermined easy operation procedure.

  As means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that two-dimensional sheet metal shape information obtained by developing an assembly and processing conditions for processing performed until the assembly is obtained from a sheet metal material. In a system for creating a sheet metal working drawing using information, processing condition information including at least processing machine application condition information of a processing machine that performs the processing and mold information in the case of using a mold for the processing is provided. Processing condition information storage means stored, two-dimensional sheet metal shape information obtained by the unfolding process, and bending attribute information of the sheet metal material when bending is included in the processing performed until the assembly is obtained. Is input based on a predetermined input operation, and when the information from the basic drawing input condition input means is input, the input information and the machining Based on the information stored in the case information storage means, the sheet metal work drawing creation means for performing an analysis on the machining process until the assembly is obtained from the sheet metal material and creating the sheet metal work drawing based on the analysis; , Provided.

  The invention according to claim 2 is the invention according to claim 1, wherein the analysis performed by the sheet metal working drawing creation means includes selection of necessary machining steps and execution order of the selected machining steps. It is characterized by.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the sheet metal working drawing created by the sheet metal working drawing creating means is a collection of work instruction contents in each machining step as one form. It is characterized by that.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the analysis performed by the sheet metal working drawing creation means includes two-dimensional sheet metal shape outer shape recognition and two-dimensional sheet metal shape. The hole shape recognition in the case of having a hole is included.

  The invention according to claim 5 is the invention according to claim 4, characterized in that the analysis performed by the sheet metal working drawing creation means includes classification of the hole into a predetermined hole shape type.

  According to the present invention, when the sheet metal working drawing creation means inputs the two-dimensional sheet metal shape information and bending attribute information from the working drawing creation basic condition input means, this information and the processing machine application stored in the machining condition information saving means are applied. Based on the condition information and mold information, the processing process until obtaining an assembly from the sheet metal material is analyzed, and a sheet metal working drawing is created based on this analysis. A working drawing can be obtained.

  FIG. 1 is a block diagram showing a configuration of a sheet metal working drawing automatic creation system according to an embodiment of the present invention. In this figure, the processing condition information storage means 1 is configured as a database for storing processing condition information including at least processing machine application condition information 2 and mold information 3. The work drawing creation basic condition input means 4 outputs two-dimensional sheet metal shape information 5 and bending attribute information 6 by a predetermined operation of the drawing creator. The sheet metal working drawing creation means 7 has an outer shape / hole shape recognition means 8, a hole shape type classification means 9, and a machining process setting means 10, and two-dimensional sheet metal shape information from the working drawing creation basic condition input means 4. 5 and bending attribute information 6 are input, a sheet metal working drawing 11 is created and output based on the input information, processing machine application condition information 2 and die information 3 stored in the processing condition information storage means 1. It is supposed to be. The drawing creator displays desired information such as the processing contents of the sheet metal working drawing creation means 7, the saved information of the machining condition information saving means 1 and the output information of the working drawing creation basic condition input means 4 on the screen of the display means 12. It can be displayed.

  The operation of FIG. 1 will be described below with reference to FIGS. First, the drawing creator outputs the two-dimensional sheet metal shape information 5 and the bending attribute information 6 obtained by developing the assembly in advance from the working drawing creation basic condition input means 4 to the sheet metal working drawing creation means 7.

  FIG. 2 is an explanatory diagram showing an example of the two-dimensional sheet metal shape information 5 and the bending attribute information 6 displayed on the screen of the display unit 12. This example of the two-dimensional sheet metal shape information 5 indicates a sheet metal shape when an elevator car operation panel panel is manufactured. The two-dimensional sheet metal shape information 5 has a solid outer line 51 indicating a panel outer shape, and the outer solid line 51 includes two cutout portions 51a. The two-dimensional sheet metal shape information 5 includes a hole solid line 52 indicating a hole at one central portion for attaching an operation button and the like, and a hole indicating ten holes through which the mounting screw member is inserted. A solid line 53 is provided.

  Further, a bending center line 61 as the bending attribute information 6 is displayed as a broken line inside the outer solid line 51. Then, when performing the bending process based on the bending center line 61, for example, information that the bending angle is 90 °, the bending radius is 0.5 mm, and the bending correction value is 1 mm is displayed. In addition, as other bending attribute information 6, a material, a plate thickness, a material dimension, a hairline direction, and the like are also displayed on the screen.

  When the two-dimensional sheet metal shape information 5 and the bending attribute information 6 are input from the work drawing preparation basic condition input means 4, the sheet metal work drawing preparation means 7 determines the outer shape / hole shape based on the function of the outer shape / hole shape recognition means 8. Recognize. FIG. 3 is an explanatory diagram of recognition of the outer shape / hole shape performed by the outer shape / hole shape recognition means 8. That is, as shown in FIG. 3A, twelve vertices 54 representing the corner (corner) portion and the intersection with the bending center line 61 are shown on the outer solid line 51, and the hole solid line 52 is shown. Four vertices 55 are shown above.

  In FIG. 3A, a polyline formed by connecting 12 vertices 54 on the outer solid line 51 and a polyline formed by connecting four vertices 55 on the hole solid line 52 are represented by 2 lines. Two closed loops are shown. Further, it can be considered that ten closed loops are also formed by the hole solid line 53. Eventually, FIG. 3A shows a total of 12 closed loops. Here, it can be considered that the two-dimensional shape of FIG. 3A is included in the rectangular broken line 56 shown in FIG. 3B, and there is one closed loop indicating the outer shape of the sheet metal. It should be. Therefore, the outer shape / hole shape recognizing means 8 is formed only by the outermost large closed loop, that is, only the polyline formed by connecting the twelve vertices 54 on the outer solid line 51 as shown in FIG. It is determined that the solid line shown represents a two-dimensional sheet metal shape, and the other closed loops represent holes.

  Next, the hole shape type classifying means 9 classifies the holes determined by the outer shape / hole shape recognizing means 8 into a predetermined hole shape type. 4A to 4B are explanatory diagrams showing examples of preset hole shape types. FIG. 4A is a round hole shape type, and is a figure composed of two 180 ° arcs having the same radius and the same center coordinates. FIG. 4B is an oblong hole shape type, and is a figure composed of two 180 ° arcs having the same radius and the same length and two parallel straight lines having the same length. FIG.4 (c) is a square hole shape type, and is a figure comprised of four straight lines in which the angles formed with adjacent straight lines are all right angles. And hole shape types other than Drawing 4 (a)-(c) are set up as a compound hole shape type. For example, FIG. 4D can be considered as a combination of two square hole shape type figures having different sizes, and FIG. 4E shows a half of one square hole shape type figure. Can be thought of as being cut into pieces.

  The processing step setting means 10 performs processing steps to obtain an assembly from a sheet metal material based on the recognition result of the outer shape / hole shape recognition means 8 and the classification result of the hole shape type classification means 9 as described above. Is analyzed using the processing machine application condition information 2 and the mold information 3 of the processing condition information storage means 1. Then, the sheet metal working drawing creation means 7 creates a sheet metal working drawing 11 based on the analysis of the machining process setting means 10.

  FIG. 5 is a flowchart relating to the analysis of the machining process performed by the machining process setting means 10. The machining process setting means 10 initializes the target process flags SS, CS, VC, BB, TP, and LZ (step 1), and further initializes machining attributes of all machining elements constituting the outer shape / hole (step 2). ).

  Here, SS is a shear, CS is a corner shear, VC is a V-groove processing machine, BB is a bender, TP is a turret punch press, and LZ is a process flag using a laser cutting machine. The processing attribute is the type of processing machine applied to the processing element (the processing element refers to the processing target part of the sheet metal and corresponds to a graphic element composed of a straight line, a circle, an arc, etc.) Is a property determined by dimensions and shape. For example, when a corner shear must be used for a notch portion having a certain dimension or less, the processing attribute is assumed to be a corner shear attribute.

  The machining process setting means 10 first determines whether or not the material dimensions are different from the part dimensions (step 3), and if they are different, the machining attribute of the linear element in contact with the rectangular area of the outer shape is a shear attribute. The flag SS is set to “true” (step 4). If not, the next processing attribute is immediately determined. In the example of this embodiment, it is assumed that the determination result in step 3 is “YES”.

  Next, the machining process setting means 10 determines whether or not there are L-shaped notches having a predetermined dimension or less at the four corners of the outer shape (step 5), and if there are, the machining attributes of the two straight lines constituting the L-shaped notch. Is a corner shear attribute and the flag CS is set to “true” (step 6). If not, the next processing attribute is immediately determined.

  FIG. 6A shows a specific example of the processing machine application condition information 2 stored in the processing condition information storage unit 1. For example, the first line in the frame describes that a corner shear is applied when the L-shaped notch dimension is 300 mm × 300 mm or less. The sheet metal working drawing creation means 7 uses this information when performing the discrimination in step 5. In this embodiment, as a result of measuring (calculating) the dimensions of the two-dimensional sheet metal shape of FIG. 2, the notch 51a has a dimension of 25 mm × 25 mm, and therefore corner shearing is performed.

  Next, the machining process setting means 10 determines whether or not there is a bending process (step 7). The sheet metal working drawing creation means 7 recognizes the bending center line 61 indicated by a broken line in the two-dimensional sheet metal shape of FIG. 2 and determines that bending is present, and sets the flag BB to “true” (step 8).

  Next, the machining process setting means 10 determines whether or not V-groove machining is necessary (step 9). This is because it is necessary to perform V-groove processing before bending in a so-called “square bending” bending process. Whether or not the V-groove processing is necessary is determined based on the value of the bending radius in the bending attribute information. For example, in the example of the two-dimensional sheet metal shape shown in FIG. 2, a material of SUS and a sheet thickness of 1.5 mm is bent by 0.5 mm, while FIG. According to the information described in the second line from the bottom of the frame, the bending bend R is 0.3 mm, 0.5 mm, 0.8 mm, and 1. for a metal plate made of SUS and having a thickness of 1.5 mm. In the case of 0 mm, V groove processing is necessary. Therefore, the machining process setting means 10 determines “YES” in step 9 and sets the flag VC to “true” (step 10).

  Next, the machining process setting means 10 determines whether or not there is one punch hole machining (step 11). There are a turret punch press and a laser welding machine as machines for drilling holes. When a hole at a target part can be machined by a die held by the turret punch press, one punch hole machining by this turret punch is performed. Give priority to.

  FIG. 6B shows a specific example of the mold information 3 stored in the machining condition information storage unit 1. The mold information 3 describes the mold type, X dimension, Y dimension, diameter, and T code (turret punch code) for the turret punch mounted on the turret punch press. The sheet metal working drawing creation means 7 determines whether or not to perform one punch hole processing using such mold information 3.

  In this embodiment, the diameter of the hole shown by the hole solid line 53 in FIG. 2 is 9 mm, and the turret punch cord “T208” can be used according to the mold information in FIG. 6B. Accordingly, the machining process setting means 10 determines “YES” in step 11, determines that the machining attribute of the hole shape is the turret punch attribute, and sets the flag TP to “true” (step 12).

  Next, the machining process setting means 10 determines whether or not there is a machining element having no machining attribute (step 13). If a machining element to which no machining attribute is added is found, the machining element is laser-cut. Since it is necessary to process, a laser cutting attribute is added to the straight line, circle, arc, etc. of the target part, and the flag LZ is set to “true” (step 14). However, in this embodiment, the determination in step 13 is “NO”, and laser cutting is not performed.

  FIG. 7 is an explanatory diagram showing the name, processing image, and work instruction content (processing condition information) in a list format for each step in the above-described embodiment. However, “material selection” is performed as a pre-stage of the first processing step. In the cutting step (shear), the “HL direction” is the hairline direction. In the planar process, the shape and dimensions of the V-groove are shown inside the two-dimensional shape, but this is due to space constraints in the drawing. The center coordinates and diameter of the hole were described in a tabular format in the hole drilling process, and were not described in the format appended to the two-dimensional shape, because it was avoided that the description of multiple dimensions overlapped and became difficult to read Is due to. In the bending process, the back gauge value is described together with an up / down arrow, and this up / down arrow is used to immediately identify which end face the dimension is from.

  1 can output the work instruction content (machining condition information) shown in FIG. 7 for each process as a form, but this increases the number of forms and makes it complicated to manage. It becomes. Therefore, in the present embodiment, the sheet metal working drawing creation means 7 adds the processing condition information in each process to the two-dimensional sheet metal shape as a single form as shown in FIG. It has become. The form description format illustrated in FIG. 8 is merely an example, and various description formats can be employed. For example, the code of each process flag described in the flowchart of FIG. 5 can be used as to which machining process is necessary.

  As described above, according to the system according to FIG. 1, the drawing creator creates the sheet metal working drawing from the working drawing creation basic condition input means 4 with the two-dimensional sheet metal shape information 5 and the bending attribute information 6 based on a predetermined operation procedure. If it is made to output to the means 7, the sheet metal work in which the two-dimensional sheet metal shape information obtained by developing the assembly and the processing condition information about the processing performed until the assembly is obtained from the sheet metal material are described. The figure can be automatically created by the sheet metal working drawing creation means 7.

The block diagram which shows the structure of the sheet metal working drawing automatic creation system which concerns on embodiment of this invention. Explanatory drawing which shows the example of the two-dimensional sheet metal shape information 5 and the bending attribute information 6 which are displayed on the screen of the display means 12 in FIG. Explanatory drawing about the recognition of the external shape and hole shape which the external shape and hole shape recognition means 8 in FIG. 1 performs. Explanatory drawing which shows the example of a hole shape type in case the hole shape type classification | category means 9 in FIG. 1 classifies the hole which the external shape and hole shape recognition means 8 discriminate | determined into a predetermined | prescribed hole shape type. The flowchart regarding the analysis about the processing process which the processing process setting means 10 in FIG. 1 performs. Explanatory drawing which shows the specific example of the processing machine application condition information 2 preserve | saved in the machining condition information storage means 1 in FIG. Explanatory drawing which showed the name, the process image, and work instruction content (processing condition information) for each process in embodiment of this invention in list format. Explanatory drawing which showed the specific example of the sheet metal work drawing 11 which the sheet metal work drawing preparation means 7 in FIG. 1 outputs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Processing condition information preservation | save means 2 Machine tool application condition information 3 Die information 4 Machine drawing preparation basic condition input means 5 Two-dimensional sheet metal shape information 6 Bending attribute information 7 Sheet metal working drawing creation means 8 External shape / hole shape recognition means 9 Hole Shape type classification means 10 Machining process setting means 11 Sheet metal working drawing 12 Display means

Claims (5)

In a system for creating a sheet metal working drawing using two-dimensional sheet metal shape information obtained by developing an assembly and processing condition information on processing performed until the assembly is obtained from a sheet metal material,
Processing condition information storage means for storing processing condition information including at least processing machine application condition information of a processing machine that performs the processing and mold information in the case of using a mold for the processing,
Work drawing for outputting two-dimensional sheet metal shape information obtained by the unfolding process and bending attribute information of the sheet metal material when bending is included in the processing performed until the assembly is obtained based on a predetermined input operation Creation basic condition input means,
When the information from the working drawing creation basic condition input means is input, the processing until the assembly is obtained from the sheet metal material based on the input information and the information stored in the processing condition information storage means Analyzing the process, sheet metal working drawing creation means for creating the sheet metal working drawing based on this analysis,
A sheet metal working drawing automatic creation system characterized by comprising: The analysis performed by the sheet metal working drawing creation means includes selection of necessary machining steps and execution order of the selected machining steps.
The sheet metal working drawing automatic creating system according to claim 1. The sheet metal working drawing created by the sheet metal working drawing creating means is a collection of work instruction contents in each processing step as one form,
The sheet metal working drawing automatic creation system according to claim 1 or 2. The analysis performed by the sheet metal working drawing creation means includes two-dimensional sheet metal shape outer shape recognition, and hole shape recognition when the two-dimensional sheet metal shape has a hole,
The sheet metal working drawing automatic creating system according to any one of claims 1 to 3. The analysis performed by the sheet metal working drawing creation means includes classification of the hole into a predetermined hole shape type,
The sheet metal working drawing automatic creating system according to claim 4.

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